Import of the watch repository from Pebble

src/fw/console/dbgserial.c

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "dbgserial.h"
+
+#include "board/board.h"
+#include "drivers/uart.h"
+
+#include <stdio.h>
+
+
+#if PULSE_EVERYWHERE
+#define DEFAULT_SERIAL_BAUD_RATE 1000000
+#else
+#define DEFAULT_SERIAL_BAUD_RATE 230400
+#endif
+
+
+void dbgserial_init(void) {
+  uart_init(DBG_UART);
+  dbgserial_restore_baud_rate();
+}
+
+void dbgserial_change_baud_rate(uint32_t new_baud) {
+  uart_set_baud_rate(DBG_UART, new_baud);
+}
+
+void dbgserial_restore_baud_rate(void) {
+  dbgserial_change_baud_rate(DEFAULT_SERIAL_BAUD_RATE);
+}
+
+void dbgserial_putstr(const char* str) {
+  while (*str) {
+    dbgserial_putchar(*str);
+    ++str;
+  }
+  dbgserial_putchar('\r');
+  dbgserial_putchar('\n');
+}
+
+void dbgserial_putchar(uint8_t c) {
+  dbgserial_putchar_lazy(c);
+  dbgserial_flush();
+}
+
+void dbgserial_putchar_lazy(uint8_t c) {
+  uart_write_byte(DBG_UART, c);
+}
+
+void dbgserial_flush(void) {
+  uart_wait_for_tx_complete(DBG_UART);
+}
+
+void dbgserial_putstr_fmt(char* buffer, unsigned int buffer_size, const char* fmt, ...) {
+  va_list ap;
+  va_start(ap, fmt);
+  vsniprintf(buffer, buffer_size, fmt, ap);
+  va_end(ap);
+
+  dbgserial_putstr(buffer);
+}